I enjoyed Oli Jacobs's first collection of short stories, so was keen to read Underneath, as an extended piece of prose.
Unfortunately a decent claustrophobic horror story is let down by constant errors. I can always forgive the odd typo, but after a fairly solid opening chapter, there is on average at least one punctuation or grammatical error on every page. Many are misplaced apostrophes, but then there are missing prepositions and other lesser sins. Individually, each is negligble, but the cumulative effect of relentless errors jerked me right out of the narrative.
There's also the ending, which I gave the benefit of the doubt as it was ambiguous - but then the author's note removes any shred of ambiguity. Which is... regrettable.
I'm disappointed as I really really wanted to like this book, and there's a decent story that would take just one more editing pass to really sharpen. I've tweeted and Goodreaded with Jacobs and he's both a dedicated and talented writer. But the simple fact is that this book wasn't ready to meet the world, and it's unworthy of him in its current form.